noun, noun which may take the genitive case particle 'no'
intestinal; inside the intestines
Refers to the interior of the intestines; often used in medical or biological contexts, e.g., 腸内環境 (intestinal environment), 腸内細菌 (intestinal bacteria).
腸内環境を整えることが健康に大切です。
Maintaining a healthy intestinal environment is important for your health.
腸内細菌のバランスが崩れると、体調を崩しやすくなる。
When the balance of intestinal bacteria is disrupted, you become more prone to getting sick.